If no one's explained it clear enough, this is a meat grinder...
Note the front plate, there are holes in it which the auger will drive the meat through, producing ground meat which you know what that looks like.
Here is the front of a corona style grain MILL..
Under that cover, rather than a die with holes to press meat through, there is actually a grinding plate.
It matches grooves cut in the front mouth of the mill body....together those are what crushes the grain.....
Now that doesn't mean someone with great DIY skills couldn't perhaps modify a meat grinder by somehow putting a grinding plate on in place of the die.....the auger is exactly the same.
In fact I found at a garage sale for 5 bucks a "combo mill" which looks to be able to grind meat and grain somewhat....
That has this strange spider leg doohicky in front of the meet die, that sort of blocks partially stuff coming through the die, and in effect the auger and die will shred the grain...but not too well....
I haven't tried with a full batch, all I did was take a few ounces of grain, ran it through the mill, then mashed it in a mason jar to see if I got conversion....iirc, it wasn't that great...I was going to experiment some more, but I got a real corona shortly after...